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Question 2: In an antenna design problem, the main lobe of an antenna array is required to point in degree. Design a 4 isotro
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Ans. An=1 n=2 n=5 Array Factor n = 10 2 First SLL = 20log0.22 = -13.15dBAbove figure is the pattern of antenna

Ans.B - An antenna array is used to increase overall gain, provide diversity reception, cancel out interference, maneuver the array in a particular direction, gage the direction of arrival of incoming signals, and to maximize the Signal to Interference plus Noise Ratio (SINR).

Following are the disadvantages of Array Antenna:

➨The coverage is limited to 120 degrees in both azimuth and elevation.

➨Lower frequency agility can be achieved.

➨Ray deflection is possible only in single plane using linear array configuration.

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